Eleven years on, they have raised £200,000 for charity and have more than 600 members across the UK.
On Friday, Boobs and Brass was given the BBC Music Day Brass Band Award, for the band that best embodies the BBC Music Day 2017 theme - "the power of music".
The band was born when brass musicians Jane Nichols and Maggie Betts decided to call on all the female players they knew for a charity concert.
With a 25-strong band, the friends expected to raise a few hundred pounds. In fact, they took £5,000.
